Chemical coating by decomposition of either solid compounds or suspensions of the coating forming compounds, without leaving reaction products of surface material in the coating (chemical surface reaction
C 23 C 8/00, C 23 C 22/00) [4]
Note
This group covers also suspensions containing non-reactive liquids and reactive solid particles. [4]
20
/
02
•
Coating with metallic material [4]
20
/
04
•
•
with metals [4]
20
/
06
•
Coating with inorganic material, other than metallic material [4]
20
/
08
•
•
with compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides [4]
Chemical surface treatment of metallic material by reaction of the surface with a reactive medium (with a reactive gas C 23 C 8/00) [4]
22
/
00
Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals (wash primers C 09 D 5/12) [4]
Notes
(1)
This group covers also suspensions containing reactive liquids and non-reactive solid particles. [4]
(2)
In groups C 23 C 22/02 to C 23 C 22/86, in the absence of an indication to the contrary, classification is made in the last appropriate place. [4]
(3)
Rejuvenating of the bath is classified in the appropriate place for the specific bath composition. [4]
22
/
02
•
using non-aqueous solutions [4]
22
/
03
•
•
containing phosphorus compounds [4]
22
/
04
•
•
containing hexavalent chromium compounds [4]
22
/
05
•
using aqueous solutions [5]
22
/
06
•
•
using aqueous acidic solutions with pH<6 [4,5]
22
/
07
•
•
•
containing phosphates [4,5]
22
/
08
•
•
•
•
Orthophosphates [4,5]
22
/
10
•
•
•
•
•
containing oxidants [4,5]
22
/
12
•
•
•
•
•
containing zinc cations [4,5]
22
/
13
•
•
•
•
•
•
containing also nitrate or nitrite anions [4,5]
22
/
14
•
•
•
•
•
•
containing also chlorate anions [4,5]
22
/
16
•
•
•
•
•
•
containing also peroxy-compounds [4,5]
22
/
17
•
•
•
•
•
•
containing also organic acids [4,5]
22
/
18
•
•
•
•
•
containing manganese cations [4,5]
22
/
20
•
•
•
•
•
containing aluminium cations [4,5]
22
/
22
•
•
•
•
•
containing alkaline earth metal cations [4,5]
22
/
23
•
•
•
•
Condensed phosphates [4,5]
22
/
24
•
•
•
containing hexavalent chromium compounds [4,5]
22
/
26
•
•
•
•
containing also organic compounds [4,5]
22
/
27
•
•
•
•
•
Acids [4,5]
22
/
28
•
•
•
•
•
Macromolecular compounds [4,5]
22
/
30
•
•
•
•
containing also trivalent chromium [4,5]
22
/
32
•
•
•
•
containing also pulverulent metals [4,5]
22
/
33
•
•
•
•
containing also phosphates [4,5]
22
/
34
•
•
•
containing fluorides or complex fluorides [4,5]
22
/
36
•
•
•
•
containing also phosphates [4,5]
22
/
37
•
•
•
•
containing also hexavalent chromium compounds [4,5]
22
/
38
•
•
•
•
•
containing also phosphates [4,5]
22
/
40
•
•
•
containing molybdates, tungstates or vanadates [4,5]
22
/
42
•
•
•
•
containing also phosphates [4,5]
22
/
43
•
•
•
•
containing also hexavalent chromium compounds [4,5]
22
/
44
•
•
•
•
containing also fluorides or complex fluorides [4,5]
22
/
46
•
•
•
containing oxalates [4,5]
22
/
47
•
•
•
•
containing also phosphates [4,5]
22
/
48
•
•
•
not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates [4,5]
22
/
50
•
•
•
•
Treatment of iron or alloys based thereon [4,5]
22
/
52
•
•
•
•
Treatment of copper or alloys based thereon [4,5]
22
/
53
•
•
•
•
Treatment of zinc or alloys based thereon [4,5]
22
/
54
•
•
•
•
Treatment of refractory metals or alloys based thereon [4,5]
22
/
56
•
•
•
•
Treatment of aluminium or alloys based thereon [4,5]
22
/
57
•
•
•
•
Treatment of magnesium or alloys based thereon [4,5]
22
/
58
•
•
•
•
Treatment of other metallic material [4,5]
22
/
60
•
•
using alkaline aqueous solutions with pH>8 [4,5]
22
/
62
•
•
•
Treatment of iron or alloys based thereon [4,5]
22
/
63
•
•
•
Treatment of copper or alloys based thereon [4,5]
22
/
64
•
•
•
Treatment of refractory metals or alloys based thereon [4,5]
22
/
66
•
•
•
Treatment of aluminium or alloys based thereon [4,5]
22
/
67
•
•
•
•
with solutions containing hexavalent chromium [4,5]
22
/
68
•
•
using aqueous solutions with pH between 6 and 8 [4,5]
22
/
70
•
using melts [4]
22
/
72
•
•
Treatment of iron or alloys based thereon [4]
22
/
73
•
characterised by the process [4]
22
/
74
•
•
for obtaining burned-in conversion coatings [4]
22
/
76
•
•
Applying the liquid by spraying [4]
22
/
77
•
•
Controlling or regulating of the coating process (controlling or regulating in general G 05) [4]
22
/
78
•
Pretreatment of the material to be coated [4]
22
/
80
•
•
with solutions containing titanium or zirconium compounds [4]
22
/
82
•
After-treatment [4]
22
/
83
•
•
Chemical after-treatment [4]
22
/
84
•
•
Dyeing [4]
22
/
86
•
Regeneration of coating baths [4]
24
/
00
Coating starting from inorganic powder (spraying of the coating material in molten state C 23 C 4/00; solid state diffusion C 23 C 8/00 to C 23 C 12/00; manufacture of composite layers, workpieces or articles by sintering metallic powder B 22 F 7/00; friction welding
B 23 K 20/12) [4]
24
/
02
•
by application of pressure only [4]
24
/
04
•
•
Impact or kinetic deposition of particles [4]
24
/
06
•
•
Compressing powdered coating material, e.g. by milling [4]
24
/
08
•
by application of heat or pressure and heat (C 23 C 24/04 takes precedence) [4]
24
/
10
•
•
with intermediate formation of a liquid phase in the layer [4]
applying molten material to the substrate (applying melts to surfaces, in general B 05) [4]
28
/
00
Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups C 23 C 2/00 to C 23 C 26/00, or by combinations of methods provided for in subclasses C 23 C and C 25 C or C 25 D [4]
28
/
02
•
only coatings of metallic material [4]
28
/
04
•
only coatings of inorganic non-metallic material [4]
30
/
00
Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C 23 C 26/00, C 23 C 28/00 take precedence) [4]
